Mold and core for hollow steel ingots.



APPLICATION FILED NOV. I9, 19.

Patented Nov. 9, 1915.

IIWEIVTOI? Johh TI Whiteley WITNESSES J. T. WHITELEY. MOLD AND CORE FOR HOLLOW STEEL INGOTS.

APPLiCATION FILED NOV. I9. 1914.

Patented Nov. 9, 1915.

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2 SHEETS-SHEET 2- I TTORI/EY John T W hxtd q WITNESSES JOHN THOMAS WHITEL EY, OF NEW YORK, N. Y.

MOLD AND CORE FOItHOLLOW STEEL INGOTS.

Specification of Letters Patent.

, Patented Nov. 9, 1915.

Application filed November 19, 1914. Serial No. 872,913.

To all whom it may concern:

Be it known that 1, JOHN THOMAS \VHITE- LEY, a subject of the King of Great Britain and Ireland, residing at +t2 Vest Sixtyfourth street, New York, N. Y., have invented new and useful Improvements in Molds and Cores for Hollow Steel Ingots, of which the following is a specification.

This invention relates to molds and cores therefor, for use in producing hollow steel ingots, the primary object being to provide a mold of sectional construction which is capable of producing a perfectly formed ingot and which may be taken apart readily to facilitate the withdrawal of the ingot after it has been formed.

A further object is to provide a collapsible core for use in the mold of the character set forth which will be very effective in use and yet is adapted to have its parts collapsed readily and speedily at the completion of the molding operation so that it may be withdrawn freely from the interior of the ingot.

Further advantages of the novel construction and combination of parts hereinafter fully described and claimed should be apparent to those persons skilled in the art to which the invention relates, particularly when the description is considered in connection with the accompanying drawlngs, in which:

Figure 1 is a side elevation of a mold constructed in accordance with the preferred embodiment of the invention, showing the parts assembled, a simple form of core being used therein; Fig. 2 is a top plan view of the same; Fig. 3 is a longitudinal sectional view on line 3-3 of Fig. 2; Fig. 4 is a transverse sectional view on line 41 of Fig. 3; Fig. 5 is a longitudinalsect-ional view of a modified form of mold, showing the parts assembled and a collapsible core tubular construction mounted'therein; Fig. 6 is a bottom plan view of this modified form of mold; Fig. 7 is a top plan view of the same; Fig. 8 is a plan view of the modified form of core. parts being in section. showing its parts assembled with the expanding spindle omitted; Fig. 9 is a plan view showing the key member partially removed, the spindle being entirely removed; and, Fig. 10 is a side elevation of the spindle alone.

Referring to the drawings by numerals and in particular to Figs. 1 to 4, inclusive, 11 and 12 designate the male and female parts which form the body of the mold when united. These parts are shown as being rectangular 1n construction so that a mold of square cross-section is formed, but it is to be understood that the parts may be constructed so that a cylindrical mold is produced, or a mold of any other desired cross-sectional contour, without departing from the spirit of the invention. This being obvious, is not illustrated. Each of these parts includes the s de portion 13 and the bottom or base portion 14 formed integral therewith so that, when the two parts are united, a mold will be formed which has its bottom closed but an open upper end. The female part 12 is provided in its longitudinal edges, which fit snugly against the corresponding edges of the male part, with longitudinal and preferably rectangular grooves 15 in communication with its interior faces. These grooves are adapted to havethe flanges 16 which project from the longitudinal edges of the male part 11 adjacent to the interior faces of the latter fitted therein when the parts are assembled, whereby a tight joint is afforded and the completed structure is rendered extremely rigid. The parts 11 and 1-2 are provided in their base portions 14 with semi-cylindrical recesses which are adapted to register to provide a cylindrical recess or socket 17 for the reception of the lower end of a core, such as that indicated by the numeral ,18, the resulting socket being positioned so as to hold the core in a central or axial position. The core in each instance is solid in construction, but it is to be understood that'any convenient form of core may be employed in connection with the particular construction of the mold described. At the upper end of the mold, a cap plate 19 is adapted to be positioned so as to rest upon the upper edges of either one of the parts of the mold, the said plate being formed only half the size of the cross-sectional area of the mold. Depending flanges 20 are provided upon three sides of the cap plate so as to engage the outer longitudinal surfaces of the mold and thus secure the plate effectively against lateral displacement in three directions when in position. A semi-circular notch 21 is provided medially in the innermost, fiangeless edge ofthe plate and is adapted to have the upper end of the core held by the operator in engagement there.- with during the brief molding operation, wherein the molten metal is poured into the mold through the unobstructed portion of its upper end. After the teeming of the ingot is completed the core may be removed very readily because of its temporary and yet secure manner of mounting.

In Figs. 5 to 7, I have shown a modified form of mold, whose parts will be maintained more secure and rigid in assembled relation and which is adapted particularly for use in connection with a modified form of core, which latter will be described more fully hereinafter. It is intended that the simple form of core disclosed in the preceding figures of drawing may be used in the modified mold. but the modified form of core is illustrated in these views. for the use of a solid core would be obvious and does not require illustration. In this form of the mold the side sections 22 and 23 are similar in construction to the corresponding parts in the preferred embodiment of the invention, but they are bottomless and are provided at their lower ends with oppositely projecting, apertured lugs 24'and 25, respectively which are adapted to register with correspondingly arranged apertured lugs 26 and 27 of a base member 28 upon which the side sections are mounted when the parts are as sembled. Securing members or cotter-pins 29 are adapted to extend through the apertured lugs to bind the same and consequently the main parts of the mold rigidly together. The base 28 is provided medially in its up per face with a centering recess 30 for the reception of the lower end of the core 31 and has also an opening 32 of smaller diameter extending from the recess completely through the base. This opening is provided for the purpose of permitting the insertion of a rod or other implement (not shown) by which the core may be driven'out through the upper end of the mold after the teeming of the ingot is completed.

A modified form of core is shown inci dentally in Figs. 5 to 7 and with particularity in Figs. 8 and 9. This core is formed in part by three segmental sections, as shown.'but itis to be understood that any convenient number of sections may be employed depending upon the size of core and. other factors. The three sections shown include a female section 33, having recesses 34 provided in its longitudinal edges, and male sections 35 and 36 arranged adjacent to the former section and having projections 37 upon their edges which engage the recessed edges of the female section for reception within the recesses 34. These edges of the sections are radially arranged, but the opposite edges 38 of the male sections are relatively inclined and afi'ord a gap therebetween for the reception of a substantially dove-tail key member 39 which is adapted to be pressed into the gap from the interior of the tubular core thus formed. An expanding spindle, shown in detail in Fig. 10, which is composed of relatively adjustable, semicylindrical sections or wedges 40 and 41, having diagonally inclined meeting faces. is adapted to be inserted within the core. after the latter has been positioned properly within a mold of the construction shown in either of the forms of the invention, and after a retaining band 42 has been placed upon the upper end of the core. the lower end of the latter being retained effectively against undue expansion by the walls of the receiving recess in the mold base. By driving the spindle sections in opposite directions. the core sections will be expanded to form a perfeet tube having very rigid connection with the base of the mold. When the core is used in connection with the modified form of mold disclosed in Figs. to 7, the presence of the opening in the mold. base permits the in troduction of driving elements (not shown) of any suitable description for operating the spindle sections, either to expand the core sections or to disconnect the spindle sections.

From the foregoing it will be apparent that I have provided a sectional construction of mold and core which obviously may find expression in various forms and modifications, but whose essential features are simplicity. durability. and time and labor economy in assembly of parts, use in molding. and separation of parts to free the ingot produced by the molding operation.

Any modifications or changes in form which involve merely mechanical skill may be resorted to in practice without departing from the basic principles of theinvention, nor the scope of the appended claims.

lVhat is claimed is:

1. In combination, a mold. comprising sides and a bottom provided medially in its inner face with a recess, a cap plate'adapted to be mounted upon. the upper end of the mold to cover substantially half of the same and having a notch in its inner edge adapted to aline with the recess in the bottom of the mold, depending flanges provided upon the cap plate for engagement with the sides of the mold, and a core adapted to be arranged centrally within the mold with its lower end fitting within the recess and its upper end engaging within the notch of the cap plate.

2. A core for molds of the class described. comprising a tubular body formed in part of a plurality of collapsible segmental'sections. in combination with a mold adapted to re ceive the core, means carried by the mold for retaining the ends of the core to resist expansion of the same, and an expanding spindle adapted to be mounted within the core and consisting of semi-cylindrical sections having diagonally arranged wedging faces in engagement with each other.

3. A core for mold. of the class described comprising a tubular body formed in part of a female and two male segmental sections adapted to be joined and to leave a gap between the adjacent edges of the male sections, the female section being provided in its longitudinal edges with recesses arranged medially between the inner and outer surfaces of the saidsection, projections provided upon the longitudinal edges of the male sections which engage the edges of the female section for reception within the recesses of the latter, the opposite edges of the male sections being relatively inclined, and a segmental key member having relatively inclined edges adapted to fit Within the gap,

in combination with a mold adapted to receive the core, means carried by the mold for retaining the ends of the core toresist expansion of the same, and means provided within the core for retaining the key member in its locking position. 1

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN THOMAS WHITELEY.

Witnesses DUDLEY B. HOWARD, JOHN C. SANDERS.

Copies of this patent may be obtained for five cents each,'by addressing the Commissioner of ratents,

' Washington, D. G. i 

